Back to results
US 9,001,907 B2Granted
Multi-rank precoding matrix indicator (PMI) feedback in a multiple-input multiple-output (MIMO) system
AssigneeTexas Instruments Incorporated
InventorsRunhua Chen, Eko N. Onggosanusi
Life of this patent
Estimating the term…
Abstract
In at least some embodiments, a system includes a multiple-input multiple-output (MIMO) base station and a plurality of MIMO user equipment (UE) devices in communication with the MIMO base station. The MIMO base station is configured to switch between a single-user (SU)-MIMO mode and a multiple-user (MU)-MIMO mode during communications with the plurality of MIMO UE devices based on multi-rank precoding matrix indicator (PMI) feedback received from at least one of the MIMO UE devices.
Claims9
An electronic device, comprising:
- at least a first antenna;
- multiple-input multiple-output (MIMO) transceiver logic coupled to the at least first antenna;
- and
- multi-rank precoding matrix indicator (PMI) feedback reporting logic coupled to the MIMO transceiver logic,
- wherein the multi-rank PMI feedback reporting logic enables the electronic device to selectively switch between a single-user (SU)-MIMO mode and a multiple- user (MU)-MIMO mode;
- wherein the multi-rank PMI feedback reporting logic generates a report comprising:
- a first PMI corresponding to a recommended precoding matrix for SU-MIMO communications between a MIMO base station and the electronic device, and a rank indicator (RI) corresponding to the rank value of the first PMI, and
- a second PMI corresponding to a precoding matrix of a pre-defined restricted rank value applicable for MU-MIMO communications between the MIMO base station and the electronic device.
5 more elements
A method, comprising:
- receiving, by a multiple-input multiple-output (MIMO) base station, multi-rank precoding matrix indicator (PMI) feedback from at least one MIMO user equipment (UE) device;
- and
- switching, by the MIMO base station, between a single-user (SU)-MIMO mode and a multiple-user (MU)-MIMO mode for communications with a first MIMO UE device based on the received multi-rank PMI feedback;
- wherein receiving multi-rank PMI feedback comprises receiving:
- a first PMI corresponding to a recommended precoding matrix for SU-MIMO communications between the MIMO base station and at least one MIMO UE device, and a rank indicator (RI) corresponding to the rank value of the first PMI, and
- a second PMI corresponding to a precoding matrix of a pre-defined restricted rank value applicable for MU-MIMO communications between the MIMO base station and at least one MIMO UE device.
3 more elements
Dependencies are inferred from the claim text.